You have a Yuki dial there. Go easy or you'll ruin it. They are fragile (paint/ finish/ lacquer) to say the least.
Best advice - put it one side. Order a Raffles dial - in white - and get to work. Raffles dials are proper bomb-proof - you can make mistakes, rub it out, start again, etc.
They are the perfect canvas to begin your mastery of dial-ageing.
Start around Page 1 of the Thread where it gets down and dirty into dials.
Personally, this is my approach:
And somehow, after all the confusion - we got here:
Start at Page 1 or so: